/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * Copyright 2011, Blender Foundation.
 */

#ifndef __COM_TRANSLATEOPERATION_H__
#define __COM_TRANSLATEOPERATION_H__

#include "COM_NodeOperation.h"

class TranslateOperation : public NodeOperation {
 private:
  SocketReader *m_inputOperation;
  SocketReader *m_inputXOperation;
  SocketReader *m_inputYOperation;
  float m_deltaX;
  float m_deltaY;
  bool m_isDeltaSet;
  float m_factorX;
  float m_factorY;

 public:
  TranslateOperation();
  bool determineDependingAreaOfInterest(rcti *input,
                                        ReadBufferOperation *readOperation,
                                        rcti *output);
  void executePixelSampled(float output[4], float x, float y, PixelSampler sampler);

  void initExecution();
  void deinitExecution();

  float getDeltaX()
  {
    return this->m_deltaX * this->m_factorX;
  }
  float getDeltaY()
  {
    return this->m_deltaY * this->m_factorY;
  }

  inline void ensureDelta()
  {
    if (!this->m_isDeltaSet) {
      float tempDelta[4];
      this->m_inputXOperation->readSampled(tempDelta, 0, 0, COM_PS_NEAREST);
      this->m_deltaX = tempDelta[0];
      this->m_inputYOperation->readSampled(tempDelta, 0, 0, COM_PS_NEAREST);
      this->m_deltaY = tempDelta[0];
      this->m_isDeltaSet = true;
    }
  }

  void setFactorXY(float factorX, float factorY);
};

#endif
